Getting the right set of permissions when creating a custom permission level in PowerShell

Despite all its power and flexibility, developing PowerShell scripts feels like a dev experience that could be had 15 years ago. Often, we find ourselves creating prototypes in VS.NET first, before diving into the murky waters of visual PowerShell editors. Having that off our chest, suppose you’re creating a PS script that creates a new SharePoint permission level. The code is not too hard, something like: